Supplements versus medications

Patient: Can I take vitamins and supplements instead of meds. to help take care of my health issues. I have heart disease, Type 2 diabetes, High cholesterol, and High Blood Pressure. I also have a St. Jude valve.I am a male, and am sixty three years old.I have been trying to find a doctor, who is an MD, and also a DO. I am not having any luck at all. they seem to be one or the other. I would really appreciate your advice…Thank you,John lauria